提速线路轨道过渡段动力响应分析

利用车辆－轨道耦合动力有限元计算,对轨道过渡段不同工况进行仿真分析，讨论了这两种因素对轨道过渡段动力系数的影响，得出不同于传统观点的结论。计算结果表明，过渡段轨道底部刚度的突变并不直接导致动力系统的增大，而一旦存在不平顺折角，轮轨之间的动力系数将急剧增大。

Dynamic Response Analyses on Track Transition in High Speed Railway

In the paper, a conclusion different from traditional views are presented, after computer analysis of track transition considering various work conditions and discussion of two factors' influence on dynamic coefficient of track transition by using FEM dynamic computational model in which vehicle and track are considered as a coupled body. The computational results show that abrupt changes in track transition vertical stiffness do not lead to the increase in dynamic coefficient of action between wheel and rail directly, while it will increase sharply once existing angle in track transition area.